lcm-and-hcf

LCM and HCF

HCF and LCM: What is LCM? What is HCF? LCM full form, HCF full form, How to find LCM of two numbers, LCM of Fractions, HCF of Fractions, HCF and LCM problems

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Online Aptitude Questions with Answers on LCM and HCF

Q16. The H.C.F. of two numbers is 11 and their L.C.M. is 7700. If one of the numbers is 275, then the other is:

  1.  279
  2.  283
  3.  308
  4.  318

Solution : 308
Q17. What will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30 ?

  1.  196
  2.  630
  3.  1260
  4.  2520

Solution : 630

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Q18. The ratio of two numbers is 3 : 4 and their H.C.F. is 4. Their L.C.M. is:

  1.  12
  2.  16
  3.  24
  4.  48

Solution : 48
Q19. The smallest number which when diminished by 7, is divisible 12, 16, 18, 21 and 28 is:

  1.  1008
  2.  1015
  3.  1022
  4.  1032

Solution : 1015

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Q20. 252 can be expressed as a product of primes as:

  1.  2 x 2 x 3 x 3 x 7
  2.  2 x 2 x 2 x 3 x 7
  3.  3 x 3 x 3 x 3 x 7
  4.  2 x 3 x 3 x 3 x 7

Solution : 2 x 2 x 3 x 3 x 7
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